GB2471563A - Device for the application of a predefined axial load - Google Patents
Device for the application of a predefined axial load Download PDFInfo
- Publication number
- GB2471563A GB2471563A GB201010889A GB201010889A GB2471563A GB 2471563 A GB2471563 A GB 2471563A GB 201010889 A GB201010889 A GB 201010889A GB 201010889 A GB201010889 A GB 201010889A GB 2471563 A GB2471563 A GB 2471563A
- Authority
- GB
- United Kingdom
- Prior art keywords
- elastically deformable
- cup
- unit
- buffer end
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000006835 compression Effects 0.000 claims abstract description 13
- 238000007906 compression Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B29/00—Accessories
- B25B29/02—Bolt tensioners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/04—Screwed connections specially modified in view of tensile load; Break-bolts for maintaining a tensile load
- F16B31/043—Prestressed connections tensioned by means of liquid, grease, rubber, explosive charge, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0241—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread with the possibility for the connection to absorb deformation, e.g. thermal or vibrational
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0258—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread using resiliently deformable sleeves, grommets or inserts
Abstract
The device for the application of a predefined axial load against a structural element 20 includes a substantially non-deformable control element 11 equipped with a base portion 12 and at least one hole 14 having an axis A for the passage of at least one cylindrical element 15 for the constraint of the device against the structural element. At least one orthogonal portion 13 perpendicular to the base has a buffer end 21 against the structural element. The device also includes an elastically deformable unit 16 associated with the base on the part of the orthogonal portion and which, at operating and rest temperature, has such a development as to exceed for a predefined length (H, figure 1) the buffer end. The elastically deformable unit is compressible starting from the rest configuration up to a configuration aligned with the buffer end so as to apply a predefined load in the direction of the axis A in relation to the compression (H) and elasticity at the operating temperature of the elastically deformable unit. The device may further be used in a structural tightening unit.
Description
DEVICE FOR THE APPLICATION OF A PREDEFINED AXIAL LOAD
AND STRUCTURAL TIGHTENING UNIT PROVIDED WITH SAID
DEVICE
The present invention relates to a device for the application of a predefined axial load and a structural tightening unit provided with said device.
In applications in the mechanical field relating
to flanged connections, there is the necessity of bringing two bodies into reciprocal contact and correctly maintaining them as such.
As can be understood, however, in order to guarantee a solid coupling, it is not sufficient that the two above-mentioned bodies to be joined be only brought into reciprocal contact, but it is also necessary for them to be firmly pressed against each other to prevent accidental de-coupling due, for example, to thermal stress, vibrational or of another nature.
A known embodiment which solves this problem envisages that a spring be placed on the stem of the screw which couples the two bodies to be joined, said spring, once compressed during the screwing of the bolt, applying a force against the two bodies.
In this way, in addition to the simple joinIng of the two bodies, the application of a force is guaranteed, which tends to keep the two bodies through which the screw passes, joined together.
These devices however have a serious drawback, due to the fact that they do not allow the force which presses against the two bodies, to be controlled and/or accurately established.
This aspect is not at all irrelevant, as excessively low stress could lead to a rapid loosening of the coupling, whereas excessively high stress could damage the same bodies to be joined and/or the bolts.
Consequently, in order to guarantee that the two joined bodies are also adequately pressed against each other, particular tightening equipment is currently on the market, called "dynamometric keys".
These keys, of both a purely mechanical or electromechanical type, while pressed on the nut, are capable of indicating the tightening torque applied and therefore the force pressing against the two bodies to be joined.
Thanks to these keys, it is therefore possible, for each tightening torque reached, to trace the value of the force acting on the two bodies to be connected.
Unfortunately however, these dynamometric keys, in addition to being extremely costly and not easy to use, have various drawbacks.
In particular, in fact, not even are the above dynamometric keys capable of exactly quantifying the force acting on the two bodies to be connected due to the friction present between the bolt head, bodies and along the threading during the tightening which inevitably alters the actual value of the tightening torque indicated by the relative dynamometric key.
Furthermore, once the nut has been tightened, at present it is not possible to periodically control whether the tightening between the bodies is still that originally established without having to resort to the use of the above dynamometric keys.
An objective of the present invention is to provide a device for the application of a predefined axial load and a structural tightening unit equipped with said device capable of solving the above drawbacks of the known art in an extremely simple, economical and particularly functional manner.
A further objective is to provide a device for the application of a predefined axial load and a structural tightening unit equipped with said device capable of applying a predefined axial load on two bodies to be joined, in an extremely precise manner. -3-.
Another objective is to provide a device for the application of a predefined axial load and a structural tightening unit equipped with said device which allows a simple periodical control as to whether the load applied is the same as that established during the tightening phases without using any tool.
These objectives according to the present invention are achieved by providing a device for the application of a predefined axial load and a structural tightening unit equipped with said device as specified in claims 1 and 15.
Further characteristics of the invention are indicated by the dependent claims.
The characteristics and advantages of a device for the application of a predefined axial load and a structural tightening unit equipped with said device according to the present invention will appear more evident from the following illustrative and non-
limiting description, referring to the enclosed
schematic drawings in which: -figures 1 and 2 are partially sectional schematic views of a first embodiment of the object of the present invention in rest and operating position respectively; -figures 3 and 4 are partially sectional schematic views of a second embodiment of the object of the present invention in rest and operating position respectively; -figures 5 and 6 are partially sectional schematic views of a third embodiment of the object of the present invention in rest and operating position respectively; -figures 7 to 9 are partially sectional schematic views of a fourth embodiment of the object of the present invention in rest position at room temperature, rest position at the running and operating temperature, respectively; -figures 10 and 11 are partially sectional schematic views of a fifth embodiment of the object of the present invention in rest and operating position respectively; -figures 12 and 13 are partially sectional schematic views of a sixth embodiment of the object of the present invention in rest and operating position respectively; -figure 14 is a partially sectional schematIc views of a seventh embodiment of the object of the present invention.
With reference to the figures, these show various embodiments of devices for the application of a predefined axial load according to the present invention and for each the relative structural tightening unit.
According to the invention, in a first embodiment, shown in figures 1 and 2, said device for the application of a predefined axial load against a structural element 20 comprises a substantially indeformable control element 11 which collaborates during the tightening with an elastically deformable unit 16.
The control element 11 is equipped with a base portion 12, provided with at least one hole 14 having an axis A for the passage of at least one cylindrical element 15, generally a screw, suitable for constraining the device against the structural element 20.
The term structural element 20 refers to the coupling of the two bodies 93, 94 which are to be joined and on which a predefined force is to be applied.
The control element 11 also comprises at least one orthogonal portion 13 integral with the base 12 which mainly develops from it in a perpendicular direction.
In particular, the free end 21 of said orthogonal portion 13, during the use of the device, is buffered against the structural element 20.
The elastically deformable unit 16 is associated with the base 12 and develops from the part of the at least one orthogonal portion 13.
In particular, at the operating and rest temperature, according to the invention, the elastically deformable unit 16 has a development which is such as to exceed for a predefined length H said buffer end 21 of the control element 11.
In this way, during the tightening, the elastically deformable unit 16 is compressed starting from the rest configuration expressed above up to a configuration aligned with the buffer end 21 due to the contact of the structural element 20 with the buffer end 21 itself Consequently the elastically deformable unit 16 applies a predefined load in the direction of the axis A in relation to the compression H, defined by the buffering of the structural element 20 with the end 21, and elasticity at the operating temperature of the elastically deformable unit 16.
In particular, therefore, the device is capable of applying a predefined axial load, as the control element 11 is indeformable, in fact, it is not possible to further compress the elastically deformable unit 16 beyond the extent allowed H. In order to maintain this state of stress, linked to the compression H of the elastically deformable unit 16 due to the contact of the structural element 20 with the buffer end 21, said buffer end 21 comprises a knurled contact surface, or generally processed to have a high friction coefficient.
In this way, the contact of the end 21 with the structural element is also maintained in the presence of vibrations and other external stress.
The control element 11 is preferably cup-shaped, wherein the at least one orthogonal portion 13 corresponds to the side surfaces of the cup element 11 itself.
In this embodiment, these side surfaces 13 are also side containment and guiding surfaces for the elastically deformable unit 16.
According to a first embodiment, the elastically deformable unit 16 comprises an elastically deformable tube element 41 which is such that at an operating temperature of the device substantially equal to room temperature, once it has been inserted in the cup element 11, it protrudes from the latter for the length H beyond the buffer end 21.
The deformable tube element 41 preferably comprises a plurality of elastically deformable rings positioned in series, wherein said rings comprise a perforated inner surface 17 for the passage of said cylindrical constraint element 15.
According to another embodiment shown in figures 3 and 4, the elastically deformable unit 16 comprises a first elastically deformable tube element 42 made of such a material that at an operating temperature, the unit of said tube element 42 and a second indeformable element 43 associated with the above first tube element 42 on the opposite side with respect to the base 12, protrudes for the length H beyond the buffer end 21.
Said second indeformable element 43 in particular protrudes for a length H beyond the buffer end 21 so that when the structural element 20 is brought in contact with the end 21 of the cup element 11, the first tube element 42, as it is compressed for the length H, applies, as in the previous case, a predefined load in the direction of the axis A in relation to the compression H, defined by the buffer of the structural element 20 with the end 21 and by the elasticity at the operating temperature of the first tube element 42 itself.
Said second indeformable element 43 is preferably also cup-shaped with a base 44 associated with the first tube element 42 and equipped with at least one hole 46 for the passage of the at least one cylindrical element 15.
In this embodiment, the side walls 45 of the second cup element 43 are situated between the side walls 13 of the first cup element 11 and the first deformable tube element 42.
In order to keep the device assembled before use, the two cup elements 11, 43 have reciprocal fixing holes 50, 51 on the side walls 45, 13, with screws 90, 91, wherein said holes 50, 51 are aligned with each other when the unit 16, first element 42-second cup element 43, protrudes for the length H beyond the buffer end 21 of the first cup element 11.
In this rest configuration, the above unit 16 protrudes for the length H beyond the buffer end 21 of the first cup element 11.
Alternatively, it is possible provide for the two holes 50, 51 be aligned when the unit 16, first element 42-second cup element 43, is aligned with the buffer end 21 of the first cup element 11.
In this case, even before assembly on the screw, the first deformable tube element 42 is compressed for the length H and applies a predefined load on the second cup 43 in the direction of the axis A in relation to the compression H and elasticity at the operating temperature of the first tube element 42 itself.
This embodiment is advantageous as it is easy to assemble whereby, when the bolts 31, 32 have been fixed, the user only needs to release the screws 90, 91 to apply, as in the previous cases, a predefined load in the direction of the axis A in relation to the compression H and elasticity at the operating temperature of the first tube element 42 itself.
According to another embodiment shown in figures 7 to 9, the elastically deformable unit 16 comprises an elastically deformable tube element 60 made of such a material that at room temperature it is aligned with the buffer end 21 and at the rest running temperature it protrudes, due to a thermal extension, up to the length H beyond the buffer end 21.
At the operating temperature therefore, this embodiment behaves exactly as in the first example described above with the advantage that at room temperature the device has a smaller encumbrance defined by the buffer end 21.
In another example illustrated in figures 10 and 11, the elastically deformable unit 16 can comprise a first elastically deformable tube element 61 and a second indeformable element 62 associated with the first deformable tube element 61 on the opposite side with respect to the base and aligned with the buffer end 21.
This embodiment is also easy to assemble, whereby when the bolts 31, 32 have been fixed, the user only needs to release the screws 90, 91 and bring the device to the operating temperature to apply, as in the previous cases, a predefined load in the direction of the axis A in relation to the compression H and elasticity at the operating temperature of the first tube element 42 itself.
In this case, the first tube element 61 is made of a material which is such that at the operating temperature, it undergoes an extension equal to the length H so that at the operating temperature, as in the embodiments previously described, the device applies a predefined load in the direction of the axis A in relation to the compression H and elasticity at the operating temperature of the first tube element 61 itself.
Also in this case, the second indeformable element 62 is preferably cup-shaped with a base 63 equipped with at least one hole 64 for the passage of the at least one cylindrical element 15 and side walls 65 situated between the side walls 13 of the first cup element 11 and the first elastically deformable element 61.
The above two cup elements 11, 62 can have on the relative side walls 65, 13, reciprocal fixing holes 70, 71 with screws 90, 91, the holes 70, 71 are aligned when the second cup element 62 is aligned with the buffer end 21 of the first cup element 11.
If the device is applied in corrosive environments, such as for example plants in marine and seabed environments, isolation means 80, 81 of the internal volume of the first cup element 11 can be envisaged, as illustrated in figure 14, such as sealing rings 80, 81 situated at the opposite sides of the cup element 11 and having a groove at both the underhead of the cylindrical element 15 and in contact with the cup element 11 possibly equipped with a circumferential tooth connection.
All the embodiment examples of the devices for the application of a predefined load described can be
I
-S -
associated with relative tightening groups comprising, in addition to the device itself, a screw for passage in both the device and in a hole 30 situated in the structural element 20 so as to protrude on one side from the base 12 and on the other from the structural element 20.
Two nuts 31, 32 are also envisaged, which act on the opposite ends of the screw 15 to bring the structural element 20 in contact against the end 21 of the first cup element 11 so that the elastically deformable unit, compressed under this condition, for the length H applies a predefined load in the direction of the screw 15 in relation to the compression H and elasticity at the operating temperature of the elastically deformable unit 16 itself.
More than one device can naturally be envisaged for the application of a predefined load associated with a single screw 15 possibly on opposite sides with respect to the structural element 20, as illustrated in figures 12 and 13.
The functioning of the device for the application of a predefined axial load and structural tightening unit equipped with said device, object of the invention, can be easily understood.
Upon screwing the nuts 31, 32, their advancing is blocked by the contact of the structural element against the buffer end 21 of the cup element 11.
Under this condition, any further tightening is inhibited as the cup element 11 is indeformable.
According to the invention, at the operating temperature, the elastically deformable unit 16 housed inside the cup element 11 is in a compressed configuration for a length H predefined by the geometry itself of the device and it therefore applies a predefined load in the direction of the screw 15 in relation to the compression H and elasticity at the operating temperature of the elastically deformable unit 16 itself.
As this condition is reached only when the structural element 20 is buffered against the end 21 of the cup element 11, it is possible to periodically verify this contact by manually acting in rotation on the cup element 11 itself.
If the cup element 11 is prevented from rotating, due to the contact constraint with the structural element 20, it can be automatically verfed that the elastically deformable unit 16 is still compressed in the predefined section H and that a predefined load is therefore applied on the structural element 20 in the direction of the screw in relation to the compression H and elasticity at the operating temperature of the elastically deformable unit 16 itself.
It can thus be seen that a device for the application of a predefined axial load and a structural tightening unit equipped with this device according to the present invention achieves the objectives previously specified.
The device for the application of a predefined axial load and a structural tightening unit equipped with this device does in fact allow a predefined axial load to be applied on two bodies to be joined in an extremely precise manner enabling an easy periodic control of the maintenance with time of the load applied with the tightening.
The device for the application of a predefined axial load and a structural tightening unit equipped with this device of the present invention thus conceived can undergo numerous modifications and variants, all included in the same inventive concept; furthermore, all the details can be substituted with technically equivalent elements. In practice, the materials used, as also the dimensions, can vary according to technical requirements.
Claims (3)
- CLAIMS1) A device for the application of a predefined axial load against a structural element (20) comprising a substantially indeformable control element (11) equipped with a base portion (12), provided with at least one hole (14) having an axis (A) for the passage of at least one cylindrical element (15) for the constraint of said device against said structural element (20), and at least one orthogonal portion (13) which mainly develops perpendicularly to said base (12) and having a buffer end (21) against said structural element (20), said device also comprising an elastically deformable unit (16) associated with said base (12) on the part of said at least one orthogonal portion (13) and which, at operating and rest temperature, has such a development as to exceed for a predefined length (H) said buffer end (21), said elastically deformable unit (16) being compressible starting from said rest configuration up to a configuration aligned with said buffer end (21) so as to apply a predefined load in the direction of said axis (A) in relation to said compression (H) and elasticity at the operating temperature of said elastically deformable unit (16).
- 2) The device according to claim 1, characterized in that said buffer end (21) against said structural element (20) comprises a knurled surface.
- 3) The device according to claim 2 or 1, characterized in that said control element (11) is cup-shaped, said at least one orthogonal portion (13) being the side surfaces (13) of said cup element (11), said side surfaces (13) forming the side containment for said elastically deformable unit (16) 4) The device according to claim 3, characterized in that said elastically deformable unit (16) comprises an elastically deformable element (41) made of such a material that at an operating temperature substantially equal to room temperature, once it has been inserted in said cup element (11), it protrudes for said length (H) beyond said buffer end (21).5) The device according to claim 4, characterized in that said deformable element (41) comprises a plurality of elastically deformable rings positioned in series, said rings comprising an inner surface (17) for the passage of said cylindrical constraint element (15) for said device against said structural element (20).6) The device according to claim 3, characterized in that said elastically deformable unit (16) comprises a first elastically deformable element (42) and a second indeformable element (43) associated with said first deformable element (42) on the opposite side with respect to said base (12), said first elastically deformable element (42) being made of such a material that at an operating temperature substantially equal to room temperature, once said elastically deformable unit (16) has been inserted in said cup element (11), it protrudes for said length (H) beyond said buffer end (21).7) The device according to claim 6, characterized in that said second indeformable element (43) is cup-shaped with a base (44) associated with said first deformable element (42) and provided with at least a hole (46) for the passage of said at least one cylindrical element (15) and side walls (45) which slide between said side walls (13) of said first cup element (11) and said first deformable element (42).8) The device according to claim 7, characterized in that said cup elements (11, 43) have, on the side walls (45, 13), reciprocal fixing holes (50, 51) with screws (90, 91), said holes (50, 51) beLng aligned when said second unit (16) protrudes for said length (H) beyond said buffer end (21) of said first cup element (11), said first deformable element (42) being in rest position.9) The device according to claim 7, characterized in that said cup elements (11, 43) have, on the relative side walls (45, 13), reciprocal fixing holes (50, 51) with screws (90, 91), said holes (50, 51) being aligned when said second unit (16) is aligned with said buffer end (21) of said first cup element (11), said first deformable element (42) being compressed for said length (H).10) The device according to claim 1, characterized in that said elastically deformable unit (16) comprises an elastically deformable element (60) made of such a material that at room temperature it is aligned with said buffer end (21) and at said operating rest temperature it protrudes by thermal elongation up to said length (H) beyond said buffer end (21).11) The device according to claim 1, characterized in that said elastically deformable unit (16) comprises a first elastically deformable element (61) and a second indeformable element (62) associated with said first deformable element (61) on the opposite side with respect to said base, said first elastically deformable element (61) being made of such a material that at room temperature said elastically deformable unit (16) is aligned with said buffer end (21), said first elastically deformable element (61) undergoing an elongation equal to said length (H) at said operating temperature.12) The device according to claim 11, characterized in that said second indeformable element (62) is cup-shaped with a base (63) equipped with at least one hole (64) for the passage of said at least one cylindrical element (15) and side walls (65) which slide between said side walls (13) of said first cup element (11) and said first elastically deformable element (61).13) The device according to claim 12, characterized in that said cup elements (11, 62) have, on the relative side walls (65, 13), reciprocal fixing holes (70, 71) with screws (90, 91), said holes (70, 71) being aligned when said elastically deformable unit (16) is aligned with said buffer end (21) of said first cup element (11).14) The device according to claim 1, characterized in that it comprises isolation means (80, 81) of the internal volume of said first cup element (11).15) A structural tightening unit (10) for the application of a predefined load against a structural element (20) comprising at least one device for the application of a predefined axial load according to any of the previous claims assembled on a screw (15) for passage into both said device and into a hole (30) situated in said structural element (20) so that it protrudes from one side of said base (12) of said first cup element (11) and on the other side from said structural element (20), there being two nuts (31, 32) acting on said opposite ends of said screw (15) so as to maintain said structural element (20) in contact against said end (21) of said first cup element (11).16) A device for the application of a predefined axial load against a structural element (20) comprising a substantially non-deformable control element (11) equipped with a base portion (12), provided with at least one hole (14) having an axis (A) for the passage of at least one cylindrical element (15) for the constraint of said device against said structural element (20), and at least one orthogonal portion (13) which mainly extends perpendicularly to said base (12) and having a buffer end (21) against said structural element (20), said device also comprising an elastically deformable unit (16) associated with said base (12) on the part of said at least one orthogonal pcrtion (13) and which, at operating and rest temperature, extends so as to exceed by a predefined length (H) said buffer end (21), said elastically deformable unit (16) being compressible starting from said rest configuration up to a configuration aligned with said buffer end (21) so as to apply a predefined load in the direction of said axis (A) in relation to said compression (H) and elasticity at the operating temperature of said elastically deformable unit (16).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI2009A001150A IT1395597B1 (en) | 2009-06-30 | 2009-06-30 | DEVICE FOR THE APPLICATION OF A DEFAULT AXIAL LOAD AND STRUCTURAL TIGHTENING ASSEMBLY EQUIPPED WITH THIS DEVICE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201010889D0 GB201010889D0 (en) | 2010-08-11 |
| GB2471563A true GB2471563A (en) | 2011-01-05 |
| GB2471563B GB2471563B (en) | 2013-10-16 |
Family
ID=41611249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB201010889A Expired - Fee Related GB2471563B (en) | 2009-06-30 | 2010-06-29 | Device for the application of a predefined axial load |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE102010025401A1 (en) |
| GB (1) | GB2471563B (en) |
| IT (1) | IT1395597B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411181A (en) * | 2013-07-01 | 2013-11-27 | 广德润视机电有限公司 | Device for fixing LED lamp on panel lamp |
| EP4067226A1 (en) * | 2021-03-31 | 2022-10-05 | Airbus Operations | Assembly for connection between two structures of an aircraft, part of an aircraft comprising such an assembly, and aircraft |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITUB20160606A1 (en) | 2016-02-09 | 2017-08-09 | Saipem Spa | Vibration damper for tubes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2120795A (en) * | 1982-05-06 | 1983-12-07 | Priest And Sons Ltd Benjamin | Load-indicating washer |
| US5709514A (en) * | 1996-05-30 | 1998-01-20 | Acadia Elastomers, Inc. | Liveload assembly |
| US6126371A (en) * | 1999-04-05 | 2000-10-03 | Lockheed Martin Corporation | Shape memory metal alloy preload attenuation device |
| JP2006144838A (en) * | 2004-11-16 | 2006-06-08 | Asahi Electric Works Ltd | Fixed axial force bolt device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2939379A1 (en) * | 1979-09-28 | 1981-05-07 | Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg | SCREW CONNECTION BETWEEN TWO CONSTRUCTION PARTS FOR ELECTRICAL APPARATUS |
| FR2841273B1 (en) * | 2002-06-20 | 2005-04-15 | Astare | DEVICE FOR PLACING A PRECONTROLLER ON A SCELLEE ANCHORING ROD |
-
2009
- 2009-06-30 IT ITMI2009A001150A patent/IT1395597B1/en active
-
2010
- 2010-06-29 GB GB201010889A patent/GB2471563B/en not_active Expired - Fee Related
- 2010-06-29 DE DE201010025401 patent/DE102010025401A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2120795A (en) * | 1982-05-06 | 1983-12-07 | Priest And Sons Ltd Benjamin | Load-indicating washer |
| US5709514A (en) * | 1996-05-30 | 1998-01-20 | Acadia Elastomers, Inc. | Liveload assembly |
| US6126371A (en) * | 1999-04-05 | 2000-10-03 | Lockheed Martin Corporation | Shape memory metal alloy preload attenuation device |
| JP2006144838A (en) * | 2004-11-16 | 2006-06-08 | Asahi Electric Works Ltd | Fixed axial force bolt device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411181A (en) * | 2013-07-01 | 2013-11-27 | 广德润视机电有限公司 | Device for fixing LED lamp on panel lamp |
| EP4067226A1 (en) * | 2021-03-31 | 2022-10-05 | Airbus Operations | Assembly for connection between two structures of an aircraft, part of an aircraft comprising such an assembly, and aircraft |
| FR3121427A1 (en) * | 2021-03-31 | 2022-10-07 | Airbus Operations Sas | CONNECTION ASSEMBLY BETWEEN TWO STRUCTURES OF AN AIRCRAFT, PART OF AIRCRAFT COMPRISING SUCH AN ASSEMBLY, AND AIRCRAFT. |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1395597B1 (en) | 2012-10-16 |
| GB2471563B (en) | 2013-10-16 |
| DE102010025401A1 (en) | 2011-01-05 |
| ITMI20091150A1 (en) | 2011-01-01 |
| GB201010889D0 (en) | 2010-08-11 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20220629 |